/Engine/Plugins/FX/Niagara/Source/NiagaraShader/Public/NiagaraShader.h
static void ModifyCompilationEnvironment ( const [FNiagaraShaderPermutationParameters](API\Plugins\NiagaraShader\FNiagaraShaderPermutationParamet-) & Parameters, [FShaderCompilerEnvironment](API\Runtime\RenderCore\FShaderCompilerEnvironment) & OutEnvironment )